Structural Work in San Marino
San Marino structural work that checks slab anchors as closely as the crawlspace, with bolts, bracing and joint details drawn for the city's review.
"Does the slab half of the house need bolts too?" That is a sound question to raise when we first walk a San Marino house that mixes a raised floor with rooms poured on grade. A slab may have anchor bolts set when it was poured, or it may have too few, bolts that miss the sill, or none along a later addition. So the walls on a slab get checked like the rest, from the garage or wherever trim exposes the plate.
Checking anchors in a slab section
Inside a garage the sill is often bare, so bolt heads can be counted and their spacing taped. In finished rooms we look where baseboard or an outlet box gives a view of the plate. An anchor that spins, a nut with no washer or a long gap between bolts all go on the list. Where anchors are missing or too far apart, the usual fix is an adhesive anchor drilled through the sill into the slab edge at the spacing the engineer sets. A slab with no thickened edge under the wall may need a different detail, and the engineer draws that too.
Bracing the raised-floor part
Where the floor rests on cripple walls, those short walls get structural plywood and the sill gets bolts or retrofit plates, fastened and nailed to the plan. The line where the raised section meets the slab section deserves its own attention, because the two parts can move differently when the ground shakes. The engineer studies how the floor framing of one meets the wall of the other and may add straps or blocking along that seam. San Marino's building department reviews the drawings, and its inspector sees each stage before plywood or finish covers it.
About our structural work serviceEverything we do in San Marino
Structural Work in San Marino: questions
Where the house rests on short wood walls, both are needed: bolts stop the frame sliding off the concrete and plywood keeps those walls from racking. A section built on a slab has no cripple walls to brace, so it needs only anchors, and those get verified at the house before anyone counts on them being there.
If the house falls within the code's limits, its prescriptive retrofit sheets, completed with the measurements we take on site, serve as the plans. A mixed foundation, a tall cripple wall or any beam work calls for an engineer, and we bring one in to draw and calculate it. Either set is what the city reviews before issuing a permit.
The hatch tells us how much room there is to work, and then we follow the sill around the perimeter. Wood moisture, the bolt count and plywood on the short walls all get recorded with photos. Where the crawlspace ends at a slab section, we note how the two foundations join, since that line shapes the retrofit.
Structural Work in other cities
More we build in San Marino
Book an inspection in San Marino
Describe the house and what it needs. We look at the structure first and send the quote in writing.